The lights in the laser room were left on after the last incursion (this is on us, as we were the last ones in there Tuesday evening) and the make-up air was OFF.  This is surprising as Rick and myself confirmed (via listening for the fan to make sure it was running) the make-up air was ON when we left the enclosure Tuesday evening.  It's entirely possible that after a long day in the enclosure I was mistaken when I thought I could hear the make-up air fan running (at the 20% level we run during Science mode, it is difficult to hear the fan) when in actuality it wasn't.  The lights have been turned off and the make-up air fan is now running at 20% (confirmed via listening for the fan.  I checked multiple times while I was out there to hopefully make sure I wasn't fooling myself).  Jeff B. and Robert both want to make quick trips into the enclosure this morning, so this will give us an excuse to turn the AC on and get the temps back down to a normal level.